Follow the instructions for a Motorola NVG510 to change the ip of the router. Should be the same.
Release your comp ip before you mashes the changes to the router.
After the change, wait a day... helps at times. Renew the comp ip.
Should work if you did it right.
All else fails...
They have a Linux version of the game from what I've read.

Run a dual boot, your fav linux os, install the game on Linux.

Play all you want... try not to get banned this time.
If you do.. go Apple...three times a charm.

How do people get banned from a gaming site anyway...? lol
... have fun, play nice.